Skip to main content
This is a pre-production deployment of Warehouse. Changes made here affect the production instance of PyPI (
Help us improve Python packaging - Donate today!

Live application settings with pluggable backends, including Redis and MongoDB.

Project Description

Store “live” application settings in a choice of key/value data stores.

This was originally a fork of django-constance, but is now independent of Django and is essentially the key/value abstraction part of the original library.

Backends currently supported: Redis and MongoDB.

Tested with Python 2.7 and Python 3.4.

The source is on github.


$ pip install waterboy


In your application, define the settings that you want to be editable:

    '<KEY>': <DEFAULT>,

For example:

    'INT_VALUE': 1,
    'LONG_VALUE': 100000000,
    'BOOL_VALUE': True,
    'STRING_VALUE': 'Hello world',
    'UNICODE_VALUE': six.u('Rivière-Bonjour'),
    'DECIMAL_VALUE': Decimal('0.1'),
    'DATETIME_VALUE': datetime(2010, 8, 23, 11, 29, 24),
    'FLOAT_VALUE': 3.1415926536,
    'DATE_VALUE': date(2010, 12, 24),
    'TIME_VALUE': time(23, 59, 59),

Then create a Config object based on these initial settings. For example, using Redis:

>>> from waterboy import RedisConfig
>>> cfg = RedisConfig(initial=CONFIG)

You then retrieve settings from the backend via attribute-style access:

>>> cfg.INT_VALUE

If the backend returns None then the default value is returned.

Similarly, setting an attribute on the Config object will transparently “upsert” (update or insert) that value in the backend.

Attempts to get or set values on the Config object will fail with an AttributeError if the key does not exist in the initial defaults dictionary:

>>> cfg.ABCD = 'abcd'
Traceback (most recent call last):
AttributeError: 'RedisConfig' object has no attribute 'ABCD'

But this behaviour may be modified by passing strict=False to the Config constructor:

>>> cfg = RedisConfig(initial=CONFIG, strict=False)

which will cause the existence check to be bypassed:

>>> cfg.ABCD = 'abcd'


Clone and run tests:

$ git clone
$ cd waterboy
$ make test

Tests are run via tox and pytest.

If redis and mongo are not running on the declared ports then the tests associated with those backends will be skipped. See the makefile for the default ports.

To install redis and mongo locally, run buildout:

$ make buildout

Then run redis in the foreground with:

$ make redis

and mongodb with:

$ make mongod

Now run all tests:

$ make test

Release History

This version
History Node


History Node


Download Files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Filename, Size & Hash SHA256 Hash Help File Type Python Version Upload Date
(15.4 kB) Copy SHA256 Hash SHA256
Source None Aug 8, 2015

Supported By

Elastic Elastic Search Pingdom Pingdom Monitoring Dyn Dyn DNS Sentry Sentry Error Logging CloudAMQP CloudAMQP RabbitMQ Heroku Heroku PaaS Kabu Creative Kabu Creative UX & Design Fastly Fastly CDN DigiCert DigiCert EV Certificate Google Google Cloud Servers